str1='111'
print(str1)
str2='222'
print(str2)
444445
5555
6666


print('{0}------{1}------{2}'.format(1,2,3))
str4='6666'
print(f'这个程序{str4}')
#print(f'{i}*{j}={i*j}')

sep =','
print( sep.join(str4))
str5='good good study'
print("good".center(30,'*'))

